Means for flattening the current waves of pulsating direct current



Feb. 26 1924.

' C. A. A. HAGHTLEJ MEANS FOR FLATTENNG THE CURRENT WAVES OF FULSRTHGDIRGT GURRENT Filed Dec. 20. 15522 'M ai Patented F eb. 2*.6, 1924.

`UNITEDSTATES( PATENT OFFICE.

'COE-NBAA!) A. HAIGHTON, OF THE HAGUE, NETHERLANDS.

` IENS FOB FLATTENING THE CURRENT WAVES 0E PULSATING DIRECT CURRENT.

Appliltion mednecember 20, l1922. Serial No. l808,078.

To all whom t may concern.'

Be it known that I, Connessi) Aarau AUcUsrUs HAioH'ioN, a subject of theQueen of the Netherlands, residing at The Hague, l Province of SouthHolland, Kingdom of the Netherlands, have invented certain new anduseful Improvements in or Relating to Means for Fiattening the CurrentWaves of Pulsating Direct Current, of which the following is aspecification.

The invention relates to means for Hattening the current waves ofpulsating direct current and more particularly of direct current asisproduced by rectifiers, the object of my present' invention being toobtain a direct current which is adapted for use in such cases, in whicha more constant direct current is re uired for guaranteeing a sat'-isfactory wor ing, :is e. for telephone pur poses. i

According to the invention a so called loose contact is placed in thecircuit, the resistance of said contact being controlled by anelectromagnet, which is energized wit the frequency of the pulsations.of the current, -the excitation of the magnet t place in such a way,that the resistances o the loose contact increase with the current andvice-versa, so that the current in the apparatus where it is consumedattains a more constant How. In order to raise the current to a certainheight during that part of the period in which it nears its zero value,yaccording to the invention one or more gas batteries are furtherconnected parallel with the source of thev pulsating direct current" forwhich e. g. a battery may be chosen, ccm-9' prising lead -lates emergedinto a solution' of alum. W en in this case the current ,of 40 therectiier exceeds a certain value, the battery accumulates energy, whichwhen/the current below' a certain value 'is yagain delivered. In orderthat the invention may' be readily imdei'stood it is hereinafter morefully described with reference 'to the accompanying drawing in which thediagra'infod the araccordiiig to the ,present inventioii il ,i istrafed.To the bindingposts a a rectifier is connected, whereas the consumerapparatus or plans are conncted to the binding posts t, l loose contactc being inserted into the conductor/,connotati the binding posts a andb, such contact 1n the diagram being shown as a microphone having carbongrains and an, iron diaphragm d. The latter is actuated upon by anelectromagnet e the windings of .which are oonnected parallel with therectifier. This electro-magnet e is ener ized with the frequency of thepulsations o the current and therefore may be inserted into thealternating current circuit of thercctien When during one period of thecurrent the voltage of the binding posts a rises, the diaphragm d willbe more attracted by the electro-magnet e, and the resistance of theloose contact c will be increased thereby, the maia current passingthrough the consumer apparatus decreasing as -a iesult therefrom. Aortion of the current will pass through t e as battery f by which thepolarization of t is battery is effected. Wien during one riod of thecurrent the voltage again creases, the diaphragm d is more feeblyattracted so that the main current again rises, whereas in the case ci acertain decrease of said voltage the gas battery f will again deliverthe currentL is obtained, that the currentwaves of the pulsating directcurrent of the rectifier are more flattened, so that such direct currentv may be used for purposes for which it could otherwise not be appliedsIt will be clear that in the circuit still otheyfresistances for afurther control as also chokingy coils" may be inserted, without the sede of the invention being departed from. fflhlbat I claim is: f

f l. In 'a pulsating direct current system means for flattening 4thecurrent waves o the pulsating direct current 'comprising avariableresistance loose contact interposed in said circuit, anelectrc-inagnetic means interposed in and energized with the frequencyof the pulsations of current in said circuit, said loose contact beingcontrolled by said electro-inagnetic means whereby, when the excitationof the electro-magnetic means is increased the resistance of the loosecontact is increased, and, when the excitation of the electro-magneticineens is decreased, the resistance of the loose contact is decreased.

2. Aosystem, for flattening the current waves of pulsating directcurrent whereina as battery is connected up in parallel with t e sourceof the pulsating direct current,

Ey arrangement it trmmagnetic means is n he fvmsrm'fc of the looseContact is and whim th@ exctaf'on of the l0 --mafmec msnns is deczimsed,the rey es, of the hmse Contact 'D decreased. n teizgimmtjv whe eof I nmy si nature.

C. ALF. A. riAIGH N.

